This is a bluebell hat fit for a toddler of about 2 years (although it
will fit me). Since the feather and fan pattern is based on 17 stitches,
I'd recommend using a thinner yarn for downsizing.

Materials

Main colour: light purple aran weight yarn, I used leftover Wolle
Rödel Merino. The finished hat weighs 58g, so that may make it just
a tiny bit over one ball - if you don't have more than one ball,
just shorten the ribbing section

Contrast colour: leftovers of green aran weight yarn for the stem
and leaves. I used Lang Yarns Merino Plus.

80cm 5mm needle, or dpns, if you don't like magic loop

Gauge: 17 st x 28 rows = 10 cm

Instructions

Hat

Chart 1:

CO 85 stitches. K 1 row, then join in the round. Start feather and fan
pattern (Chart 1). Repeat pattern 3 times. Then start the ribbing, first
bringing the number of st down to an even 80 by doing the decrease round
(Chart 2). Continue knitting k6, p2 rib for about 32 rows or about 11 cm
(4.5 in). Shorten the ribbing section if it looks like you'll run out of
yarn soon :).

Continue in i-cord on remaining 5 stitches for about 1.5 cm (0.75 in),
then cut off yarn, thread through 5 sts and draw tight.

Leaves

Chart3:

Using green yarn, make one big leaf by following Chart 3 and a small one
by following Chart 3, leaving out rows 5 - 8 (so you only have 2 yo rows
and 7 sts at most). Note that the chart shows only odd rows, the even
ones are just plain purling.

Finishing

Weave in all ends. Sew leaves to top where they look cute. Place on
toddler or baby car in vicinity and smile :) If you have a very small
baby, you can add ties by braiding some green and purple yarn through
the center 2 of the petals (keep one petal in between, that's the
back!). Toddlers may keep the hat on, if you're lucky and keep taking
pictures.